Lambert heads back to Norwich following three fine seasons there. The arbitration hearing over his summer move to Villa Park will be held in the new year and the Scot is unsure of the reception he will receive.
"Other people will make more of it than I will," he said. "I'd like to think sensible supporters might think, 'He's done all right'. The sad thing is people don't know what's been going on.
"I believe we're playing very well," he added. "Norwich are going fine themselves but we'll be a threat, that's for sure."